When I set Torrc for Exit {us} it only chose 1-2 of the same exits even though the database shows many many more Exit relays for the US. Did not matter how many times I changed identity, and or session changes over days/weeks. I only used if for about 2-3 week period. Also very slow............Bridges or not bridges has no apparent difference. If China can block bridges USA obviously can as China learns most of their tricks from USA about popularized Totatlitarianisms.